1 files changed, 21 insertions, 20 deletions
diff --git a/apps/web/src/lib/commands/timeline/tracks-snapshot.ts b/apps/web/src/lib/commands/timeline/tracks-snapshot.ts
index d397431c..2493f19b 100644
--- a/apps/web/src/lib/commands/timeline/tracks-snapshot.ts
+++ b/apps/web/src/lib/commands/timeline/tracks-snapshot.ts
@@ -1,20 +1,21 @@
-import { Command } from "@/lib/commands/base-command";
-import type { TimelineTrack } from "@/lib/timeline";
-import { EditorCore } from "@/core";
-
-export class TracksSnapshotCommand extends Command {
-	constructor(
-		private before: TimelineTrack[],
-		private after: TimelineTrack[],
-	) {
-		super();
-	}
-
-	execute(): void {
-		EditorCore.getInstance().timeline.updateTracks(this.after);
-	}
-
-	undo(): void {
-		EditorCore.getInstance().timeline.updateTracks(this.before);
-	}
-}
+import { Command, type CommandResult } from "@/lib/commands/base-command";
+import type { TimelineTrack } from "@/lib/timeline";
+import { EditorCore } from "@/core";
+
+export class TracksSnapshotCommand extends Command {
+	constructor(
+		private before: TimelineTrack[],
+		private after: TimelineTrack[],
+	) {
+		super();
+	}
+
+	execute(): CommandResult | undefined {
+		EditorCore.getInstance().timeline.updateTracks(this.after);
+		return undefined;
+	}
+
+	undo(): void {
+		EditorCore.getInstance().timeline.updateTracks(this.before);
+	}
+}